St Kilda

Site overview: This site is an archipelago west of the Outer Hebrides and is made up of wave-exposed reefs. There are kelp forests here, along with diverse communities of anemones, sponges and soft corals. There is one of the most extensive sea cave systems in the UK here. The cave walls are blanketed only by sponges. Rarely recorded nocturnal species have also been found in the inner caves, including types of crab and anemones.

Designation Status
Last Updated
6 June 2017
MPA Type
Special Area of Conservation
MPA Purpose
areas which have been identified as best representing the range and variety within the European Union of habitats and (non-bird) species listed on Annexes I and II to the Directive


57° 50' 15" North,
8° 33' 52" West

Surface Area

253.94 km2
(98.05 mi.2 )


63.81 km
(39.65 mi.)

Iconic features protected by this site


  • Reefs
  • Sea caves (Submerged or partially submerged sea caves)